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Laboratory Test Directory

Folate, RBC


Name Method Department Units
Folate, RBC Quantitative Chemiluminescent Immunoassay
Send Out ng/mL

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Purple tube (EDTA)

3 mL 2 mL

Pink tube (EDTA)

6 mL 2 mL

Frozen - 2 month(s)
Room temperature - 2 hour(s)
Refrigerated - 4 hour(s)

Specimen Preparation

  • Mix EDTA tube by gentle inversion immediately after collection
  • Transfer 1 mL whole blood to an ARUP Amber Transport Tube and freeze within 2 hours

Reasons for Rejection

  • Clotted specimen
  • Non frozen specimen
  • Not protected from light


Hematocrit must be performed and indicated on the test request form. If the patient has not received a transfusion or experienced excessive bleeding between the RBC folate draw and the hematocrit draw, any hematocrit drawn within 24 hours of the RBC folate draw is acceptable. If a hematocrit is not available, run one on the current collection before processing. If a hematocrit is not available, enter "Not Available" and ARUP will use generic values to calculate the results. Protect from light during collection, storage, and shipment.

CPT Code

  • 82747